Question

Coefficient of x² in (x+7)(x-7) is​

Answer 1

ANSWER:-

As we know that,

(a + b)(a - b) = a² - b²

Therefore,

= (x + 7)(x - 7)

= x² - (7)²

= x² - 49

Therefore, coefficient of x² in (x + 7)(x - 7) is 1

▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃

Answer 2

$coefficient \: of \: {x}^{2} in \: (x + 7)(x - 7) \: is \\ \\ = > (x + 7)(x - 7) = {x}^{2} - {7}^{2} \\ \\ = > {x}^{2} - 49 \\ \\ = > coefficient \: of \: {x}^{2} is \: 1$